EP 0571038 A1 19931124 - Process for the preparation of a polyisocyanate containing isocyanurate groups.
Title (en)
Process for the preparation of a polyisocyanate containing isocyanurate groups.
Title (de)
Verfahren zur Herstellung eines Isocyanuratgruppen enthaltenden Polyisocyanats.
Title (fr)
Procédé pour la préparation d'un polyisocyanate contenant des groupes isocyanurate.
Publication
Application
Priority
NL 9200906 A 19920522
Abstract (en)
The invention relates to a process for the preparation of a compound containing polyisocyanate and isocyanurate groups through trimerisation of 1,4-tetramethylenediisocyanate (TMDI), using a trimerisation catalyst, and the purification of the trimer desired, characterised in that the trimerisation is effected at a temperature below 90 DEG C, the purification being effected through extraction, using an apolar solvent with a boiling point below 180 DEG C, and evaporation of the solvent under lowered pressure, at a temperature below 90 DEG C.
IPC 1-7
IPC 8 full level
C07D 251/34 (2006.01); C08G 18/79 (2006.01)
CPC (source: EP)
C07D 251/34 (2013.01); C08G 18/792 (2013.01)
Citation (search report)
- [AD] EP 0105242 A2 19840411 - MOBAY CHEMICAL CORP [US]
- [A] NL 278895 A 19641110 - ICI LTD
- [A] GB 985144 A 19650303 - ICI LTD
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI NL PT SE
DOCDB simple family (publication)
EP 0571038 A1 19931124; JP H0632786 A 19940208; NL 9200906 A 19931216
DOCDB simple family (application)
EP 93201405 A 19930518; JP 11947693 A 19930521; NL 9200906 A 19920522